Table 1.
Serum panel characteristics*
| Age (years) | Number of days after first hospital day sera was collected (acute and follow-up) | Peak acute EIA serology IgM/IgG (ratio) (OD units) | Acute dengue serologic diagnosis | Clinical diagnosis | Viral isolation |
|---|---|---|---|---|---|
| 4 | Day 11, Day 374 | 146/27 (5.4) | Primary dengue | DF | DENV-1 |
| 6 | Day 8, Day 368 | 82/13 (6.3) | Primary dengue | DF | DENV-1 |
| 11 | Day 9, Day 354 | 103/46 (2.2) | Primary dengue | DF | DENV-1 |
| 3 | Day 11, Day 368 | 130/65 (2.0) | Primary dengue | DF | DENV-2 |
| 9 | Day 9, Day 366 | 168/39 (4.3) | Primary dengue | DF | DENV-3 |
| 8 | Day 11, Day 367 | 221/0 (> 1.8) | Primary dengue | DF | DENV-3 |
| 10 | Day 9, Day 369 | 74 / 468 (0.16) | Secondary dengue | DF | DENV-1 |
| 7 | Day 11, Day 368 | 18 / 350 (0.05) | Secondary dengue | DHF Gr. I | DENV-1 |
| 10 | Day 9, Day 380 | 46/168 (0.27) | Secondary dengue | DHF Gr. II | DENV-1 |
| 10 | Day 11, Day 374 | 18/208 (0.087) | Secondary dengue | DHF Gr. II | DENV-2 |
| 10 | Day 10, Day 367 | 47/248 (0.19) | Secondary dengue | DHF Gr. II | DENV-2 |
| 3 | Day 8, Day 369 | 48/272 (0.18) | Secondary dengue | DF | DENV-2 |
| 5 | Day 9, Day 369 | 26/95 (0.27) | Secondary dengue | DHF Gr. III | DENV-3 |
| 6 | Day 10, Day 374 | 105/168 (0.63) | Secondary dengue | DF | DENV-3 |
| 7 | Day 9, Day 368 | 57/188 (0.30) | Secondary dengue | DHF Gr. II | DENV-3 |
| 13 | Day 9, Day 372 | 144/363 (0.40) | Secondary dengue | DF | DENV-4 |
| 9 | Day 8, Day 374 | 145/245 (0.59) | Secondary dengue | DHF II | DENV-4 |
| 9 | Day 10, Day 177 | 89/255 (0.35) | Secondary dengue | DF | DENV-4 |
*
EIA = enzyme immunoassay; OD = optical density; DF = dengue fever; DHF = dengue hemorrhagic fever; Gr. I–IV = grade I–IV; DENV = dengue virus.